Controlling Two Network Card by LabVIEW

Hi,
I'm using LabVIEW 8.5 and Windows XP.
I am intending to use LabVIEW to control a PC with 2 network cards in it.
I want to send TCP/IP packet out from one network card,
and receive the packet from another network card.
Do I have to change the confguration of the XP system?
How can I assign those two different cards to send and receive individually?
Can anyone tell or suggest what to do for me
Thank you very much~ ^^

You will not be able to directly prohibit the network cards from receiving or transmitting. You can define your network routes on the PC to route the traffic in the manner you want. Each network adapter will need to have its own IP address. NI's Internet Tool kit has a few issues, most notably the FTP VIs, when using multiple NICs. In addition, any DNS requests made will be routed to the primary network card. Windows determines which interface it thinks is the primary interface. From a code perspective using the native TCP or UDP VIs you will not have to do anything special.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot

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Hi,
According to your description, my understanding is that you want to use the WS 2008 to share Internet connection and provide web filtering function for internal clients.
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Best Regards,
Eve Wang
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Two network cards configuration

Hi
I have problem with my network - I have two network cards and it seems they can't live both but I need them both so:
1st card (rtl8139) is connected to cable modem and gets ip by DHCP (eth0="dhcp" in rc.conf)
2nd card (nv forcedeth) is connected to router and gets ip by DHCP too (eth1="dhcp")
When I start them both -> 1st and 2nd card gets good IP by DHCP but when I want to ping google.com for example packet is lost.
What I want ? I want to use my eth0 (1st card) for internet and my 2nd card for local network.
##EDIT##
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Last edited by cpu (2007-02-22 22:46:09)

Messy setup IMO, but anyway....
Your faulty resolv.conf is the reason you can't ping google. Edit it manually as required, and then use the -R flag in /etc/conf.d/dhcpcd to prevent it being overwritten. DHCP on both interfaces will probably cause routing issues as well, in which case you will need the -G flag.

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Is the network up? (sudo ifconfig -a). Can you see eth0?
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Messy setup IMO, but anyway....
Your faulty resolv.conf is the reason you can't ping google. Edit it manually as required, and then use the -R flag in /etc/conf.d/dhcpcd to prevent it being overwritten. DHCP on both interfaces will probably cause routing issues as well, in which case you will need the -G flag.

Windows sharing with two network cards

Hello,
I am running OSX 10.4.11 and enables Windows file service.
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Hello Jay,
Your question does make sense!
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First you need to find out the real name of the interface on which the Windows file service should run. One way is to look under Apple\About this Mac\Network or in a terminal enter:
ifconfig
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Is it ok to create iSCSI connection over two different network card?
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PLEASE Help on two network cards in server

Hi all,
(Sorry my spelling Im danish)
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"sudo sysctl -w net.inet.ip.forwarding=1"
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HOST UNREACHABLE - two network cards

We have two ethernet cards. The first has a static
IP address. This is the card that is used for our
internal network. The second card recieves a dynamic
IP address from a DHCP server. The second card is
used to connect our machine to the internet. When we
disable the second card we are able to make a socket
connection and connect to our database. When the
second card is enabled the socket connection fails and
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What must be configured here ?
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null

Messy setup IMO, but anyway....
Your faulty resolv.conf is the reason you can't ping google. Edit it manually as required, and then use the -R flag in /etc/conf.d/dhcpcd to prevent it being overwritten. DHCP on both interfaces will probably cause routing issues as well, in which case you will need the -G flag.

Udev, two network cards

Hi!
I installed ARCH again. I didn't configure Xorg7 yet because I play with udev and my network cards. I have one integrated on the motherboard (3Com) which I use for Internet and I have D-Link card which I did use with my wifes computer and I live this card in for future. During installation was okay but after update I have a problem. Now I use a wifes computer and at this momemnt after sixt reboot network works.
How can i save this problem, please?
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lumiwa wrote:
Hi!
I installed ARCH again. I didn't configure Xorg7 yet because I play with udev and my network cards. I have one integrated on the motherboard (3Com) which I use for Internet and I have D-Link card which I did use with my wifes computer and I live this card in for future. During installation was okay but after update I have a problem. Now I use a wifes computer and at this momemnt after sixt reboot network works.
How can i save this problem, please?
Mitja
Some information more:
lsmod show me now when network works skge and sk98lin.
dmesg | grep etho:
skge eth0: addr....skge eth0: enabling interfaces
skge eth0: Link is up to 100 Mbps...
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eth0: no IPv6 routers present

MAC (Media Access Control)Addreess, Network Card address.

Hi ,
Could you please tell me
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its urgent !
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ramesh

You can get the mac address by running ipconfig in a
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//First run ipconfig
Process conf =
Runtime.getRuntime().exec("c:/windows/ipconfig.exe
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// then parse out the response
DataInputStream ds = new
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e it
There is a lot more information returned here as well
you might find usefull.This solution seems platform specific. Do you have a solution that is more portable?

Network stream Two network adaptor cards in PC comms with crio

Hi all,
I have two network adaptor cards in my pc which i think is causing my problems when collecting data over the tcp.
I'm seeing an error message -314340 from the create network stream write/read my address match up and i'm using a template crio vibration data logger.
I have two network cards in my pc. I think the error is a tcp one and I’m wondering if this is causing the problem. I’ve given the crio a static ip address 10.0.0.2 with mask 255.255.0.0
You can see the network adaptor below and it’s ip address 10.0.0.1 so I’m connected directly to this via ethernet cable. However from the Routes print cmd I don’t see the 10.0.0.2. Also the gateway for the crio is default at 0.0.0.0
Do I need to add the route to the list ? I found the cmd for that which I don’t think I’m using right… route ADD 10.0.0.2 MASK 255.255.0.0 10.0.0.1
Cheers
Solved!
Go to Solution.

Hi i'm using the crio data logger template from the create project list:
I'll post my code and some pretty pictures to help explain myself
I'm using a different crio, so i created a new project and configured the FPGA vi for my hardware, then added the host side. I can run the code see the waveforms after 10 seconds it outright crashes and i've been searching through all the error messages tracking it back to some unfound reason. The irony is sometimes the program creates a tdms file and makes a deposit in the crio folder/deposit (this is defined from an xml file)
I do notice within a few seconds the cpu on the waveform panel increases to 70+% before crash, so i'm also thinking the FIFO read is at fault, but it could be another red heiring (just installing the real time exection package so i can trace this better).
I've changed the number of channels from the default 4 to 2 please look in the VibConfig.xml file to see the change as the [Host] Create Config XML.vi doesn't like to changing the channel from 4 for some reason.
My set up is [SENSORS] ==> [cRIO] ==ETHERNET==> [PC] Please help
Attachments:
LOG3.zip ‏1584 KB
error63036.png ‏18 KB

Problems with SRW224G4 switch and Bridged Network Cards

Hello,
We have recently installed a SRW224G4 switch and have discovered that when we plug our DELL PowerEdge 2900 server into the switch, the switch loses all network connectivity and all of the LED's on the switch start flashing.
The server works perfectly well plugged into another switch, but as soon as we introduce the SRW224G4 into the network, either with the server plugged into that switch or any other, the problem re-occurs.
The only way we found we could eliminate this issue was if we disabled the Bridged Network connection on the two network cards on the server. If we do that, everything is fine, except the network performance of the server has dropped significantly.
The server is plugged into the 1GB ports on the switch, although we tried it on the 100MB ports and received the same problems. The switch reports that the ports are running at full-duplex.
Has anyone noticed this behavior before, and more importantly been able to rectify it.
Thanks in advance for your assistance,
Paul

I had this problem as well with any Linksys 2024 or rackmountable switch.. The trick is, you need to use the network cards management software to "team" or bridged the 2 NIC's otherwise the switch detects a loop and the whole thing locks up. So lame... Windows built in bridge mode stinks dont use it. When you use the Intel management software or Dell or HP's NIc management software you have the option to actually choose "redundant mode" where you can pick a Nic to be the primary, or you can choose Load Balancing where you can essentially double your throughput by joining the 2 nics.
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Hope this helps
fdigi

Controlling Two Network Card by LabVIEW

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